Need some help please

I had a d & c becuz i was miscarriaging at 8 weeks on Nov 11th my hubby and I sexed the 26th I know we was supposed to wait but he works off on jobs and is gone for months at a time.. aunt flow is supposed to be her Dec 11th but I haven't had a period yet after d and c ... I started bleeding today but keep getting faint lines on test??? Is this old or could it be new pregnancy and new hormones? ? Am I just crazy? Help please